I had an issue Live Migrating VMs and it boiled down to the fact that my pair of Nexus 5548's did not have their ARP tables sync'd. I was told by TAC to remove the peer-gateway command from the VPC Domain.
vpc domain 1
role priority 100
peer-keepalive destination 10.8.128.2 source 10.8.128.1
delay restore 120
peer-gateway <----- remove this
auto-recovery
Apparently there is an internal bug CSCto89187 in NX-OS version 5.0(3)N2(2) and the workaround is to remove the peer-gateway command which from my understanding this command simply routes packs destined to its peer MAC instead of sending it across the peer-link for the peer to route.
My question is this. Since I have HSRP configured, wouldn't the MAC address for packets be the Virtual MAC address which is shared between both N5K's? If this is true packets should always be destined to the same MAC, the virtual MAC, so how did removing the peer-gateway command fix my problem?
Thanks in advance!
